scholarly journals MATTERS OF LOAD DECREASE IN TRACTION DRIVE UNITS AT BOXING

2021 ◽  
Vol 2021 (1) ◽  
pp. 43-51
Author(s):  
Andrey Kosmodamianskiy ◽  
Dmitriy Shevchenko ◽  
Pavel Zhirov
Keyword(s):  
Slip Rate ◽  
Electric Locomotive ◽  
Wheel Slip ◽  
Wheel Pair ◽  
Traction Drive ◽  
Electric And Magnetic Fields ◽  
Load Increase ◽  
The Impact ◽  
Similar Dynamic ◽  
Instantaneous Control

The purpose of this work consists in the development of constructive solutions decreasing loads in the units of the electric locomotive traction drive at boxing. The investigations carried out in the field of electric locomotive operation on domestic railways have shown that one of the basic directions in the decrease of non-sprung masses consists in the introduction of an elastic tie between a wheel pair and a drive motor armature. The improvement mentioned results in the considerable load increase in the traction drive at friction self-oscillations arising in the mode of wheel slip on a rail. The analysis, carried out in the work, of methods to reduce similar dynamic loads has shown that approaches efficient enough are: - shock vibro-damping of wheel pair self-oscillations, - limitation of wheel slip rate on a rail with the control of friction factor by means of the impact upon a contact area of electric and magnetic fields, - changes of elastic-dissipative properties of dynamic systems in an electric locomotive running gear to control self-oscillation fashions. To realize measures described there are offered constructive solutions limiting self-oscillation amplitudes in a boxing mode. In particular the system of instantaneous control with clutch amplifies based on the application of magnetic inductor in the form of a mounted unit upon a crew section of an electric locomotive. For realization of the method for the process control of the competition of self-oscillation fashions there is offered a design of the device changing forcibly a fashion of growing self-oscillations at the expense of the control of elastic-dissipative properties of dynamic system links in the traction drive. The innovation solutions developed are protected with the patent for invention, two patents for utility model.

PROBLEMS IN DEVELOPMENT OF ENERGY-SAVING TRACTION DRIVE

2021 ◽  
Vol 2021 (3) ◽  
pp. 25-38
Author(s):  
Dmitriy Antipin ◽  
Vladimir Vorob'ev ◽  
Oleg Izmerov ◽  
Maksim Maslov ◽  
Vadim Korchagin ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Electric Current ◽  
Problem Solution ◽  
Wheel Pair ◽  
Traction Drive ◽  
Alarm Systems ◽  
Traction Current ◽  
Current Impact ◽  
The Impact ◽  
Instantaneous Control

The problems of traction properties increase in locomotives are considered. The necessity in devices for instantaneous control of a friction coefficient of wheels and rails based on the impact of electric current or a magnetic field upon a wheel/rail contact area. There are defined basic fields of researches essential for the actual realization of such devices. It is defined that devices based on electric current impact require the introduction of considerable changes in the units of a crew part for wheel pair insulation and searches of problem solution in the separation of traction current and control one and the prevention of control current impact upon alarm systems. It is offered to consider magnetic amplifiers of adhesion as a solution of a short-term outlook which can be introduced in an existing locomotive fleet and those using current impact as a solution of newly-developed promising machines. There is offered a design of an individual traction drive simplifying a problem in the arrangement of devices for instantaneous control of a friction coefficient.

Modeling of Tread Block Contact Mechanics Using Linear Viscoelastic Theory3

2008 ◽  
Vol 36 (3) ◽  
pp. 211-226 ◽  
Author(s):  
F. Liu ◽  
M. P. F. Sutcliffe ◽  
W. R. Graham
Keyword(s):  
High Speed ◽  
Slip Rate ◽  
Material Model ◽  
Contact Forces ◽  
Block Modeling ◽  
Rate Dependent ◽  
Linear Viscoelastic Material ◽  
Linear Viscoelastic ◽  
The Impact ◽  
Good Agreement

Abstract In an effort to understand the dynamic hub forces on road vehicles, an advanced free-rolling tire-model is being developed in which the tread blocks and tire belt are modeled separately. This paper presents the interim results for the tread block modeling. The finite element code ABAQUS/Explicit is used to predict the contact forces on the tread blocks based on a linear viscoelastic material model. Special attention is paid to investigating the forces on the tread blocks during the impact and release motions. A pressure and slip-rate-dependent frictional law is applied in the analysis. A simplified numerical model is also proposed where the tread blocks are discretized into linear viscoelastic spring elements. The results from both models are validated via experiments in a high-speed rolling test rig and found to be in good agreement.

scholarly journals A Novel Longitudinal Speed Estimator for Four-Wheel Slip in Snowy Conditions

2021 ◽  
Vol 11 (6) ◽  
pp. 2809
Author(s):  
Dongmin Zhang ◽  
Qiang Song ◽  
Guanfeng Wang ◽  
Chonghao Liu
Keyword(s):  
Control Strategies ◽  
Low Cost ◽  
Estimation Error ◽  
Slip Rate ◽  
Vehicle Speed ◽  
Acceleration Sensor ◽  
Wheel Slip ◽  
Longitudinal Acceleration ◽  
Tire Rotation ◽  
Speed Estimator

This article proposes a novel longitudinal vehicle speed estimator for snowy roads in extreme conditions (four-wheel slip) based on low-cost wheel speed encoders and a longitudinal acceleration sensor. The tire rotation factor, η, is introduced to reduce the deviation between the rotation tire radius and the manufacturer’s marked tire radius. The Local Vehicle Speed Estimator is defined to eliminate longitudinal vehicle speed estimation error. It improves the tire slip accuracy of four-wheel slip, even with a high slip rate. The final vehicle speed is estimated using two fuzzy control strategies that use vehicle speed estimates from speed encoders and a longitudinal acceleration sensor. Experimental and simulation results confirm the algorithm’s validity for estimating longitudinal vehicle speed for four-wheel slip in snowy road conditions.

Expansion of Ratio Range of Shaft Drive CVT by Using Zero-Spin Disk

2007 ◽  
Author(s):  
Yukihito Narita ◽  
Masashi Yamanaka ◽  
Katsumi Inoue
Keyword(s):  
Slip Rate ◽  
Speed Ratio ◽  
The Novel ◽  
Evaluation Function ◽  
Input Output ◽  
Traction Drive ◽  
Parallel Input ◽  
Ratio Range

The novel mechanism CVT (Shaft Drive CVT, S-CVT) was developed by the authors. It transmits power by a traction drive same as the half toroidal CVT. S-CVT has parallel input/output shafts with conical or concave disks and the idler shaft having conical rollers at both ends, which is placed perpendicularly to the input/output shafts. All disks and rollers can move along each axis directions, and these movements produce the ratio changing by the changes of the rotational radii. The efficiency is the key evaluation function of CVT. To improve the efficiency, the backup roller mechanism was devised. Its effectiveness was confirmed by the experiment, and the efficiency of 95% was obtained by modified prototype S-CVT. This paper deals with the expansion of ratio range of S-CVT. In case of using the present disks, S-CVT has a difficulty to expand the narrow ratio range of 4 (0.5 to 2) because of the large slip brought by the spin. To expand the ratio range, the zero-spin disk/roller was devised. The shape of zero-spin disk/roller satisfies the condition that the spin does not occur at any speed ratio. According to the calculation, the slip rate becomes less than 1% at any speed ratio. To confirm the effectiveness, the prototype S-CVT with zero-spin disk was manufactured. It has the ratio range of 0.43 to 2.35. To obtain the slip rate the experiments were carried out at the speed ratio of 0.43, 1 and 2.35. At each speed ratio, the slip rate of less than 1% was obtained, and the effect of the zerospin disk was confirmed.

scholarly journals ANALISIS HUBUNGAN SALURAN TEGANGAN TINGGI LISTRIK TERHADAP JARINGAN SELULAR DI DAERAH GRAHA INDAH TAMBAKBOYO LAMONGAN

JOUTICA ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 255
Author(s):  
Kemal Farouq Mauladi ◽  
Nurul Fuad
Keyword(s):  
Public Health ◽  
Magnetic Fields ◽  
Electric Field ◽  
Cellular Networks ◽  
Electromagnetic Fields ◽  
Electricity Generation ◽  
Negative Impact ◽  
Electrical Energy ◽  
Electric And Magnetic Fields ◽  
The Impact

Telecommunications technology is developing very rapidly, ranging from users or engineers. The development of smartphone smartphones is also increasingly in demand, so that the use of electricity needs is also increasing. The need for electricity usage has resulted in more standing voltage in some settlements. The establishment of sutet will have a negative impact on public health. In addition, the influence of electrical energy on humans occurs because the electrical energy generated by electricity generation or electricity that is channeled gives rise to electromagnetic fields. The higher the voltage required by an equipment, the greater the electric field that is distributed. Besides that, it can also find ways to reduce the negative impact of the electric and magnetic fields produced by SUTET which impacts the process of the occurrence of electric and magnetic fields on SUTET. From the problems above, the author intends to determine the effect or correlation between the impact of SUTET on cellphone network transmissions or channels. This research can later determine the negative impact caused by SUTET for the surrounding community, and the impact of SUTET radiation on cellular networks.

Electromagnetic environment on extensive rail areas and the process of using electronic safety systems

2018 ◽  
Vol 121 ◽  
pp. 21-30
Author(s):  
Kamil Białek ◽  
Jacek Paś
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Interference ◽  
Electronic Equipment ◽  
Electromagnetic Environment ◽  
Security Systems ◽  
Electric And Magnetic Fields ◽  
Safety Systems ◽  
The Impact

The article presents the results of research electric and magnetic fields in the field of higher frequencies, which are produced by electronic security systems in large logistics areas. The paper also presents the background of the electromagnetic environment. Distorted electromagnetic environment can interfere with the operation of electrical and electronic equipment that are used in the railway area. Particular attention has been paid to the impact of electromagnetic interference on selected electronic security systems.

Resource calculation of weared equipment for electric trains of the ES2G series

2020 ◽  
pp. 43-50
Author(s):  
A. A. Vorob’ev ◽  
◽  
S.O. Zyazev ◽  
Keyword(s):  
Comparative Analysis ◽  
Wear Rate ◽  
Wear Surface ◽  
Mathematical Expectation ◽  
Operating Time ◽  
Operating Conditions ◽  
Wheel Pair ◽  
Rolling Surface ◽  
Flange Thickness ◽  
The Impact

The article discusses the impact of operating conditions on the wear of the wheels for ES2G electric trains. Thanks to the information on the controlled parameters of the wheel pairs (rolling, flange thickness and rim diameter) of ES2G electric trains operated by the MCC (Moscow Central Circle ) and the Oktyabrskaya Railway, a comparative analysis of the wear surface intensities of the rolling surfaces for seamless-rolled wheelsets has been performed. The analysis of the dependences of the mathematical expectation for the controlled parameter on the operating time showed that the wear rate of the rim for the electric trains operated by the MCC is 2,9 % higher than by the Oktyabrskaya Railway. Similar results were obtained for milling bar (2,33 % ) and the ridge thickness (24,3). Based on the results , it was concluded that the wheelsets wear of the ES2G series electric trains differs significantly in the two compared sections of circulation. Electric trains serving the Oktyabrsky direction has the intensity wheel pair wear lower than the trains serving the MCC. This will allow more time before turning to restore the profile of the rolling surface. The estimated value for the durability indicator of 90 % of the resource before changing the wheel pairs for the maximum wear of the rim is 2 million km at the MCC and 4.4 million km at the Oktyabrskaya Railway.

A Research on Anti-Slip Regulation for 4WD Electric Vehicle with In-Wheel Motors

2013 ◽  
Vol 347-350 ◽  
pp. 753-757
Author(s):  
Li Zhou ◽  
Lu Xiong ◽  
Zhuo Ping Yu
Keyword(s):  
Control Strategy ◽  
Sliding Mode ◽  
Traction Force ◽  
Slip Rate ◽  
Control Effect ◽  
Wheel Slip ◽  
Slip Ratio ◽  
Tire Force ◽  
Optimal Slip Ratio ◽  
Electrical Vehicle

This paper proposes a wheel slip control strategy for 4WD Electrical Vehicle with In-wheel Motors. In the first part of this paper, a brief introduction of sliding mode control for acceleration slip regulation is given. Consider that its control effect varies with road conditions, another algorithm which can automatically adapt to different roads is designed. This method takes advantage of the peculiarity of the longitudinal static tire force curve and regulates wheel slip ratio to the detected optimal value, aiming to maximize the traction force while preserving sufficient lateral tire force. Simulation results show that the slip rate can be regulated to a value around the optimal slip ratio, and the driving torque is very close to the maximum transmissible torque. The control strategy achieves stronger stability, shorter driving distance and hence better control performance.

scholarly journals Optimal Slip Ratio Based Fuzzy Control of Acceleration Slip Regulation for Four-Wheel Independent Driving Electric Vehicles

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Guodong Yin ◽  
Shanbao Wang ◽  
Xianjian Jin
Keyword(s):  
Fuzzy Logic ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Fuzzy Logic Control ◽  
Fuzzy Controller ◽  
Angular Acceleration ◽  
Slip Rate ◽  
Wheel Slip ◽  
Slip Ratio ◽  
Logic Control

To improve the driving performance and the stability of the electric vehicle, a novel acceleration slip regulation (ASR) algorithm based on fuzzy logic control strategy is proposed for four-wheel independent driving (4WID) electric vehicles. In the algorithm, angular acceleration and slip rate based fuzzy controller of acceleration slip regulation are designed to maintain the wheel slip within the optimal range by adjusting the motor torque dynamically. In order to evaluate the performance of the algorithm, the models of the main components related to the ASR of the four-wheel independent driving electric vehicle are built in MATLAB/SIMULINK. The simulations show that the driving stability and the safety of the electric vehicle are improved for fuzzy logic control compared with the conventional PID control.

Sign in / Sign up

Export Citation Format

Share Document